Method of winding orthocyclically wound coils



March 1966 w. VAN DER HOEK ,ETAL 3,237,375

METHOD OF WINDING ORTHOCYCLICALLY WOUND COILS Original Filed Sept. 25,1959 3 Sheets-Sheet 1 29a 9 FIG. 1

' mvsmons FIG-3 MLHELMUS L.L.LENOERS WILLEM VAN DER HOEK LUDO VICUSMEGENS AGENT March 1966 w. VAN DER HOEK ETAL 3,237,375

METHOD OF WINDING ORTHOCYCLICALLY WOUND COILS s Sheets-Sheet 2 OriginalFiled Sept. 25, 1959 Zv mmm Tmwosa FIG. 7

INVENTO S WILHELMUS L.L. LENDERS WILLEM VAN DER HOEK LUDOVICUS MEGENS BYf u AGENT March 1966 w. VAN DER HOEK ETAL 3,237,875

METHOD OF WINDING ORTHOCYCLICALLY WOUND COILS 5 Sheets-Sheet 3 OriginalFiled Sept. 25, 1959 //IIIIIIIIIIIIIIIII4 IIIIIIIll/IIII!'illllllll/I/IIIIIJ lawn.

l 5 2 l i 2 m m m V m FIG.13

WILHRMLG LL. LENDERS WILLEM VAN DER "(l K LUDOVICUS MEGENS AGENT UnitedStates Patent 3,237,875 NIETHOD 0F WINDING ORTHOCYCLICALLY WOUND COILSWillem van der Hoek, Wilhelmus Leonard Louis Lenders, and LudovicusMegens, all of Emmasingel, Eindhoven, Netherlands, assignors to NorthAmerican Philips Company, Inc., New York, N.Y., a corporation ofDelaware Original application Sept. 25, 1959, Ser. No. 842,516, nowPatent No. 3,109,601, dated Nov. 5, 1963. Divided and this applicationApr. 9, 1963, Ser. No. 277,973 Claims priority, application Netherlands,Oct. 24, 1958, 232,575 11 Claims. (Cl. 2429) This application is adivision of our application Serial No. 842,516, filed September 25,1959, now Patent No. 3,109,601.

This invention relates to a machine for winding orthocyclic coilsbetween flanges and on a template or coil former, preferably coils ofinsulated copper wire and more particularly such coils having apolygonal aperture for a core and a plurality of layers of windings.

The term orthocyclic coil is defined as a coil in which at least thegreater part of each turn lies in one plane at right angles to the axisof the coil.

Such coils afford the advantages of a high space factor and that theturns of one layer are accommodated in the grooves of the underlyinglayer and hence cannot come between it or the grooves of another layerwhich lies still deeper, so that great potential differences between twowindings do not occur.

Although orthocyclic coils have been known for a long time, such coilscould not be manufactured successively in large numbers in a normalmanufacturing process, because the first layer, which is decisive forthe further winding process, requires special skilled knowledge on thepart of the winder, and the thickness of the wire is frequently onlysmall.

In a more specific sense the invention pertains to a machine for windingsuch coils having a polygonal aperture for the core and a plurality oflayers of winding, in which the coil former or template on which thecoil is wound performs a rotational movement, and in which at a shortdistance from the coil there is provided a wire guide which performswith respect to the coil former or template, a reciprocating movementparallel to the coil former or template and with a length of strokeapproximately equal to the width of the coil to be wound. The machine isprovided with a driving rod which performs a reciprocating continuousmovement over approximately the full length of stroke, the wire guidebeing cou- I pled to this rod so that the movement of the wire guidetakes place in a step-wise manner, each step corresponding to thedistance between the sequential planes which are at right angles to theaxis of the coil and in which each time the largest portion of a turn islocated. As before, the advantage of the machine according to theinvention resides in the security that the greater part of each turnlies in a plane at right angles to the axis of the coil so that thefirst layer which is decisive for the correct structure of the coilsatisfies the requirements imposed.

In one embodiment of the invention, a coil-winding machine for windingcoils having a polygonal aperture for the core is characterized in thatthe stepwise movement of the wire guide takes place at the moment whenthe wound wire has just been laid on the last edge of the template orcoil former located before the beginning of the first turn of the firstwinding. Due to the friction which the applied portion of the turnencounters on the edge, the wire is fixed in position and does not shiftwhen now the wire guide is moved and hence the deviation is imparted tothe wire.

ice

In a further embodiment of the invention, means are provided for givingthe wire guide not only the step-wise movement, but also a transientreciprocating second displacement, the forward part of which lies in thesense of winding. The wire is thus prevented form exerting an axialpressure upon a winding already laid on the coil former and since suchaxial pressures would be accumulated, a high pressure would finallyresult, which detracts from the accuracy of the dimensions of the coiland, in the case of insulated wire, could also damage the insulation ordeform the wire.

The invention will be described with reference to the accompanyingdrawing, in which:

FIG. 1 shows diagrammatically a machine for winding orthocyclic coils;

FIG. 2 shows, on an enlarged scale, the connection between the wireguide and the driving rod;

FIG. 3 shows, again on an enlarged scale, part of the coupling betweenthe wire-guide rod and the driving rod;

FIG. 4 shows the complex of levers which serves to give the wire-guiderod both a stepwise displacement and a reciprocating displacement;

FIG. 5 is a side View of the lever for releasing the clamped connectionof the wire-guide rod of FIG. 4, as viewed in the direction of thearrow;

FIG. 6 is an elevation view of the lever for displacing the clampingdevice of FIG. 4, again as viewed in the direction of the arrow;

FIG. 7 shows, on an enlarged scale, a side view of the double tiltingnut of FIG. 1;

FIG. 8 is a side view of FIG. 7, taken along the line VIII-VIII, and asviewed in the direction of the arrow;

FIG. 9 is a side view of the stop nut;

FIG. 10 shows diagrammatically a coil former with two turns of anorthocyclically wound coil, together with the wire guide;

FIG. 10a is an end view of FIG. 10;

FIG. 11 is a side view of FIG. 10 with several positions of the wire tobe wound;

FIGS. 12 and show diagrammatically the movement of the wire guide; and

FIG. 13 shows diagrammatically the manner in which the first turn of thesecond layer is laid.

In the figures, the reference numeral 1 indicates a coil spindle whichis driven by an electric motor 2 and which is supported at points 3 and4. The coil spindle 1 drives a quadrangular coil former 5 with flanges6, which is supported at the side remote from the coil spindle by meansof a mandrel 7 which is displaceable in a manner not shown. In knownmanner, which is likewise not shown, the coil former 5 follows themovement of the coil spindle 1 upon rotation of the latter. In addition,the coil spindle 1 carries a cup-shaped disc 8 and a cam disc 9. Securedto the coil spindle 1 is a chain wheel 10 which drives through a chain11 a wheel 12 which is secured to a shaft 13. The latter carries a gearwheel 14 which co-acts with a similar gear wheel 15. The two gear wheels14 and 15 drive identical threaded shafts 16 and 17, each of which isprovided with two diametrically opposite grooves 18 and 19. Moveableabutment nuts 20 and 21, which will be described with reference to FIG.9, are arranged on the threaded shafts 16 and 17. The two shafts areseparated by a rod 22 which has rigidly secured to it a double tiltingnut 23 which will be described with reference to FIGS. 7 and 8. The rod22 is pivotally connected to a rod 23a having a pivot 24 which isdisplaceable in a guide 25. For this purpose, an elongated slot 26 isprovided in lever 23a. The latter is pivotally connected to a drivingrod 27 which carries a comblike part 28 rigidly secured to driving rod27 by means of a screw 29a. The comb-like part 28 is provided with acollar 29 (see FIG. 2) which has secured to it a wireguide holder 30 bymeans of a screw 31.

A wire-guide rod 32, which is held in position by means of a clampingdevice 33 (see FIGS. 4, 5, and 6) carries at one end a coupling piece 34which is rigidily connected to wire-guide rod 32 by means of a screw 35.The coupling piece 34 also comprises a spindle 36 on which a wire-guide37 is arranged. The wire-guide 37 can rotate in known manner (not shown)on spindle 36, but cannot slide axially on it. The wire-guide rod 32 canslide in the comb-like part 28. The coupling between the combi can holdthe wire-guide rod 32 comprises a cylinder 43 having a cavity 44 intowhich the rod 32 fits in part. One end of cylinder 43 has a collar 45and its other end has a smaller cylindrical portion 46 provided with acollar 47. The assembly is supported by a fixed part 48 of the machine,a spring 49 being provided between the fixed part 48 and the collar 47.The cylindrical portion 46 can slide in the part 48 of the machineagainst the action of spring 49. The cylinder 43 is surrounded by asleeve 50 which is made of resilient material and arranged eccentricallyabout cylinder 43 so that the rod 32 is clamped between the sleeve 50and the groove 44. At the lower side of clamping sleeve 50 there isprovided an abutment bolt 51 which is secured in a fixed part 52 of themachine. At the upper side of the sleeve 50 there is provided anadjustable pressure bolt 53 arranged in one end of a lever 54. The lever54 can pivot about a fixed point 55 and comprises, at its other end, aroller 56 which co-acts with a cam 57 of the cam disc 9. One end of alever 58 presses against the collar 47 and its other end 59 co-acts witha cam 60 of the cup disc 8. The lever 58 can pivot vabaout the eccentriccylinder 61 provided with a ratchet disc 62. Between the ratchet disc 62and the lever 58 there is provided a torsion spring 63, the ends ofwhich are connected to ratchet disc 62 and lever 58 respectively. Thecylinder 61 is eccentrically connected to a fixed part 65 of the machineby means of a bolt 64 so that the sleeve 61 can rotate eccentricallyabout the bolt 64. A ratchet latch or the like 66, which can rotateabout a fixed point 67, co-acts with the ratchet disc 62 and a movableabutment 68 arranged on the driving rod 27 can co-act with an arm 69 ofthe ratchet latch 66. The moveable abutment nuts 20 and 21 are of aspecial design, as shown in FIG. 9, in order to obtain a rapid and alsoaccurate adjustment of the said nuts. The nut 20 itself, which isprovided with two pointed screws 70 and 70a which co-act with thegrooves 18 and 19 in the threaded shaft 16 or 17, carries an abutment71. Each nut is threaded over half its circumference, the other halfbeing provided with a recess 72. Upon loosening the pointer screw 70a,the nut can thus be radially displaced on the threaded shaft 16 andsubsequently displaced axially. There are two grooves 18 and 19 topermit the nut to be turned through 180 and subsequently fixed inposition.

The double tilting nut 23, as shown in FIGS. 7 and 8, comprises twoparts 23a and 23b which are rigidly connected together and clamped inposition on the shaft 22 by means of clamping pieces 73a and 73b so thatthey can rotate about a shaft but cannot slide on it. The said parts arethreaded at the area indicated by 74a and 74b. Each part also has aridge 75a and 75b, respectively, which forms part of the segment of acircle, the centre of which lies on the centre of the threaded shaft 17or 16. If in FIG. 7 the set of nuts 23 moves to the right, then at agiven moment the abutment 71a co-acts with the segment of a circle 75aand hence the set of nuts 23 thus being tilted so that the screw threads74a starts to co-act with the threaded shaft 16 and the sense ofmovement of the shaft 22 varies.

In order to clarify the operation of the assembly, the FIGS. 10, 10a and11 will first be considered. FIGS. 10 and 10a show a quadrangular coilformer 76 which has a flange 77 and on which an orthocyclic coil is tobe wound. The wire 79 which is of copper insulated by a lacquer layerand finally provided with a thin layer of thermoplastic material (aso-called adhesive layer) is shown with exaggerated thickness for thesake of clarity. This wire actually has a much smaller diameter. Thebeginning of the wire is passed through an aperture 78 of the flange 77,the first turn being laid in a plane at right angles to the axis of thecoil former 76. As soon as the wire 79 has been laid on the coil formerthrough a little more than three quarters of a turn, the wire must begiven a deviation equal to the distance between two planes in which eachtime the greater part of one turn is located so that the subsequent turncomes at the right place. Since the wire does not encounter friction onthe flat portions of a quadrangular coil former, the deviation must beimparted only when the wire has been laid on the last edge (in this caseedge 80) before the beginning of the turn. As soon as the wire is thusfixed in position on the edge 80, the wire-guide 37 is given adisplacement with respect to the initial position 81, which displacementis equal to the diameter of the wire. The wire-guide 37 lies at somedistance from the coil former and, after the displacement thereof, thewire occupies a position as indicated by a dash-and-dot line (at anangle on with the plane of the first turn). This is the correct positionof the wire guide for laying the second turn, but then during laying thelast quarter of the first turn the wire exerts an axial pressure uponthat portion of the first turn which lies on the first edge (83), as mayclearly be seen from the figure. The wire is deformed as a result ofthis pressure and accordingly as more turns are laid, the length of thewinding at the edge 83 of the coil former is smaller than the winding atthe other edges, due to this deformation, which is not permissible inpractice. As a result of this difference, it may occur, for example,that on this edge the distance between the last turn of the first layerand the flange, which distance in the case of an orthocyclic coil mustbe equal to half the diameter of the wire, is larger and may sometimesbe more than the diameter of the wire, so that the first turn of thesecond layer lies on the relevant edge. This axial pressure may beavoided by giving the wire a transient second displacement whereby thewire guide 37 assumes the dotted position 82. The wire itself thenassumes the position likewise shown in dotted line of FIG. 10, in whichthe wire is laid along the first turn 79 without axial pressureoccurring. This second displacement must also be given only when thewire is held in position on the edge 80. The second displacement must bemaintained until the wire is fixed in position on the subsequent edge83. Then the wire-guide must be moved from the dotted position 82 to theproper position 37. The foregoing is clarified further in FIG. 11 inwhich it has been assumed for the sake of clarity that the wire-guideturns about the coil. As soon as the wire has been laid on the edge 80after passing through angle P (FIG. 11), the wire-guide is given adisplacement through an angle cc which corresponds to a displacementfrom position 81 to position 37 in FIG. 10. Then the wire is securelyheld on the edge 80 and is wound through angle r (FIG. 11). Shortlythereafter, the wire is given a displacement through an angle 5 wherebythe wire guide in FIG. 10 is moved from position 37 to position 82. Thissecond displacement is obivated as soon as the wire fixedly lies on theedge 83 after passing through the angle g. It will be evident that thesecond displacement could involve difficulty at the end of the firstlayer of turns, since th r i a risk f the wire then running up thesecond flange. In view thereof, the second displacement is not given tothe wire for the last few turns, which is not objectionable since theaxial pressure of the last few turns is not dangerous. It will also beevident that the second displacement is not required for the second andfurther layers of turns, since the wire then comes to lie in the dale oftwo turns of the underlying layer and if these turns have been laidproperly, no more axial pressures occur between the wires of the secondlayer. The displacements of the wire guide which cause the displacementof the wire are shown again in FIG. 12 in which the length of the coilis plotted on the a-axis and the b-axis is divided into periods in eachof which one turn is laid, the position of the wire guide with respectto these two axes being shown. Point corresponds to the plane in whichthe first turn has been laid. The Wire'guide then steps on to point d,the length of this displacement being equal to the distance between theplanes in which two sequential turns have been laid. Subsequently, thewire-guide remains in this position for a short moment (the angle r inFIG. 11) and then a second displacement follows which is obivated againafter the angle q whereafter the wire-guide returns to the positionwhich it occupied at d. This is repeated during the greater part of thefirst layer of turns. It is also possible to arrange for the seconddisplacement to follow immediately the first displacement, as shown inFIG. 120.

With references to FIGS. 1, 2, 3, 4, and 6, it will now be explained inwhat manner the various displacements are obtained. When the electricmotor 2 sets the coil spindle 1 into motion, the coil former 5 starts torotate, which also causes rotation of the chain wheels and 12, thelatter of which has a diameter twice that of the wheel 10. The gearwheels 14 and 15 are of equal ,size so that the threaded shafts 16 and17 rotate at half the speed of the spindle 1. The wire guide 37 isassumed to have a position such that the first turn is laid on the coilformer 5. Due to the motion of the threaded shaft 16 or 17, and of theco-acting nut 23, the rod 22 is moved to the left so that the drivingrod 27 is moved to the right. This driving rod takes along the comb-likepart 28 and the wire guide holder 30. However, the wire-guide rod 32 isclamped between the cylinder 43 and the resilient sleeve 50 and sincethe Wire guide 37 is secured to the spindle 36 which in turn is rigidlyconnected to the coupling piece 34, one end of which is secured to thewire-guide rod 32, the wire-guide keeps in position. The spring 38 isthus compressed and sleeve 40 slides in the comb 41 due to its beingrigidly connected to the wire-guide rod 32. As soon as the coil spindle1 has performed one revolution, the cam 57 (FIG. 5) of cam disc 9engages the roller 56 so that the lever 54 turns about the fixed point55 and the pressure bolt 53 deforms the resilient sleeve 50, the lowerside of which engages the fixed abutment 51. Consequently, thewire-guide rod 32 is released and by the action of the compressed spring38, moves on one step (to the right in the drawing) so that thewire-guide 37 assumes the next position. The variation in the positionof the wire guide 37 thus takes place in a step-wise manner. Since thespring 39 is twice as strong as the spring 38, the rest position of therod 32 with respect to the comb-like part 28 is fully determined. Afterthe wire-guide rod 32 has been displaced, the lever 54 returns to itsinitial position since the cam 57 releases the roller 56 and thewireguide rod 32 is again clamped in position. After the coil spindle 1has rotated further a small angle (angle 2' of FIG. 11), the cam 60 ofcup disc 8 abuts against the end 59 of lever 58. This lever thus turnsabout the eccentric 61, its other end being urged against the collar 47of clamping device 33. The clamping device 33, which can slide in thefixed part 48, is then moved to the right against the pressure of spring49 and thus drives the wire-guide rod 32, whereby the sleeve and theplate 42 (FIG. 3) are taken along and spring 39 also is compressed,since the movement of the wireguide rod is greater than the continuousmovement of the comb-like part 28 which continues to move under theinfluence of rod 17 nut 23 etc. Thus, the second displacement of thewire guide is obtained. As soon as the cam 60 releases the lever arm 59,the arm 58 moves to the left and, due to the springs 49 and 39, theclamping device 33, the sleeve 40 and the plate 42 re-assume theirinitial positions.

The second displacement of the wire guide is not required for laying thelast turns of the first layer and all the turns of the subsequentlayers. The second displacement is switched olt by means of the moveableabutment 68 which is arranged on driving rod 27 and which at a givenmoment engages the arm 69 of a latch 66 or the like. The latch 66 isthus turned away and now, due to the stressed torsion spring 63, theeccentric 61 performs half a revolution about the bolt 64 so that theend of lever 58 no longer engages the collar 47 and hence the lever 58is inoperative. By means of a simple lever (not shown), the eccentric 61is moved into the initial position before the winding of a new coil isstarted whereby the torsion spring 63 is stressed again and the latch 66again meshes with cam disc 62.

A second displacement in laying the second layer of turns cannot beobtained with the structure shown and described. However, the clampingdevice may be connected to the fixed part 48 in a simple manner so thata movement which is subject to spring tension is possible to each side,in which event two levers 58 are required which are applied to each sideof the clamping device.

The laying of the second layer of turns, when the wire guide 37 thuseach time must move in a stepwise manner to the left, is effected in asimilar manner as described for the movement to the right. In this case,sleeve 40 and plate 42 keep in position to the right of the comb 41until the wire-guide rod is released and the sleeve and the plate againassume the positions shown. The force then acting upon the rod 32 isequal to the difference between the spring forces of the springs 38 and39.

The laying of the first turn of the second layer, indicated by 84 inFIG. 13, will now be described. It is usually desirable for each layerto comprise the same number of turns. When the first turn of the firstlayer engages the flange, then the last turn of the first layer must lieat a distance from the flange equal to half the diameter of the wire, inorder to obtain the first turn of the second layer in the properposition. Now, the machine is adjusted so that three quarters of arevolution of the coil spindle 1 after the last displacement of the wireguide, the driving rod 27 reaches its extreme position. Thereafter, themovement of the driving rod 27 reverses due to tilting over the nuts 23.If the distance covered by the driving rod 27 during a completerevolution of the coil spindle 1, is indicated by s, then the drivingrod at the moment of tilting has covered As. During the remaining onequarter of a revolution of the coil spindle, the driving rod 27 coversthe distance Mas, but in the opposite sense. Consequently, the totaldisplacement is /2s, and when the wire-guide rod is now released, it cancover only a distance of /2S in the original sense. Thus, the positionof the first turn of the second layer is determined.

One of the advantages of the use of abutment nuts and tilting nuts and athreaded shaft wit-h respect to a known drive comprising a cam disc andgear wheels, is that, when the number of turns per layer is varied, theabutment nuts may be axially displaced without the abovementionedadjustment being disturbed. At the same time, it may be shown withreference to FIG. 13 how important it is that more particularly inWinding thin wire the axial pressure of the turns is suppressed as far 6as the starting point.

as possible. If, for example, wire of 50 microns is wound, the spacingbetween the last turn and the flange must be 25 microns. If this spacingis only to microns larger, the turn 84 is irrevocably drawn between theturn 85 and the flange and the winding of the coil also irrevocablyfails.

The number of turns per layer is adjusted by adjustment of the abutmentnuts 20 and 21. The length of stroke of the wire guide 37 is exactlydetermined by the displacement of the pivot 24 of lever 23. Also theproper adjustment of the spacing between the last turn of the firstlayer and the flange is determined by the adjustment of pivot 24. If afixed distance between the flanges is given and also with a giventhickness of the wire, it is adjustment of the pivot 24. Also in thecase of wire having an irregular outer diameter, the laying of the turnswith a little amount of play is sometimes desirable. It is thenadvantageous to choose the inner side of flange In order to leave thisstarting point unchanged upon adjustment, the guide 25 in which thepivot 24 is displaceable is arranged parallel to the initial position oflever 23.

With a machine realized in practice, the smallest thickness of wire withwhich a coil could be wound was microns, and the largest wire thicknesswas 500 microns. The number of revolutions of the coil spindle was 1000per minute. It is evidently possible to arrange a plurality of coilformers on the coil spindle, in which event a corresponding number ofwire guides must be provided which can be controlled, however, by acommon wire-guide rod.

As a rule, it is preferably for the wire guide to be arranged from thecoil to be wound at a distance which is not unduly large, sinceotherwise the second displacement becomes unnecessarily large. Thecloser the wire guide is arranged to the coil, the smaller the seconddisplacement need be.

While we have described our invention in connection with specificembodiments, other modifications thereof will be apparent to thoseskilled in this art. Accordingly, we do not wish to limit ourselves tothe specific embodiments shown and described, but desire that the scopeof the invention be as broadly construed as permissible in view of thesubjoined claims.

What we claim is: V

1. Apparatus for winding orthocyclically wound coils on a coil former,comprising means for rotating said coil former, a wire-guide means fordirecting wire onto said coil former, a driving rod, drive means forimparting continuous movement to said driving rod, means connecting saiddriving rod and wire-guide, said last-named means being moved by saiddriving rod, and means operatively connected with said last named meansfor periodically imparting a step-wise movement to said wire guiderelative to said last named means.

2. Apparatus for winding orthocyclically wound coils on a polygonal coilformer, comprising means for rotating said coil former, a Wire-guidemeans for directing wire onto said coil former, a driving rod disposedin a plane parallel with the longitudinal axis of said coil former,drive means for imparting continuous linear movement to said drivingrod, means connecting said wire-guide and driving rod, said last namedmeans being continuously moved by said driving rod, and meansoperatively connected with said last named means for periodicallyimparting step-wise movement to said wireguide relative to said lastnamed means, said step-wise movement being substantially equal to thedistance between sequential planes which are at right angles to the axisof the coil and in each of Which a greater part of each turn is located.

3. Apparatus for winding orthocyclically wound coils on a polygonal coilformer, comprising means for rotating said coil former, a wire-guidemeans for directing wire onto said coil former, a driving rod, drivemeans for imparting continuous linear movement to said driving rod in afirst direction and alteratively in the opposite direction, meansconnecting said driving rod and said wire guide, said last named meansbeing continuously moved by said driving rod, and means operativelyconnected with said last named means for periodically impartingstep-wise movement to said wire-guide relative to said last named meanswhereby the wire-guide follows movement of said driving rod in astep-wise manner to form the layers of wire in said coil, and means toimpart to the wire-guide a transient reciprocating second displacement,the forward portion of which is in the direction of movement of saiddriving rod to prevent exertion of axial pressure between turns of wirein said layers.

4. Apparatus for winding orthocyclically wound coils on a polygonal coilformer comprising means for rotating said coil former, a wire guidemeans for supplying wire to said coil former, and means for periodicallymoving said wire-guide in a step-wise movement relative to said coilformer, said means including a wire-guide rod supporting saidwire-guide, a continuously linearly moving driving rod, means includinga biased spring coupling said driving rod and said wire-guide rod, aclamping device for locking the wire-guide rod against movement, andmeans for releasing the clamping device for unlocking the wire-guide rodfor a short time during each revolution of said coil former whereby thewire-guide rod assumes a new position under the action of the springproportional to movement of the driving rod.

5. Apparatus for winding orthocyclically wound coils on a polygonal coilformer comprising means for rota-tin-g said coil former, a wire-guidemeans for directing wire onto said coil former, and means periodicallyreciprocally moving said wire-guide in a step-wise movement relative tosaid coil former, said means including a wire-guide rod supporting saidwire guide, a continuously linearly moving driving rod, biased springmeans coupling said driving rod and said wire-guide rod, a clampingdevice for locking the wire-guide rod against movement, means connectedwith said clamping device for imparting movement to said clamping devicefor releasing the clamping device for unlocking the wire-guide rod for ashort time during each revolution of said coil former whereby thewire-guide rod assumes a new position under the action of the saidspring means for preventing axial pres sure between turns of wire insaid coil.

6. Apparatus for winding orthocyclically wound coils on a polygonal coilformer comprising means for rotating said coil former, a wire-guidemeans for supplying wire to said coil former, and means periodicallyreciprocally moving said wire-guide in a step-wise movement relative tosaid coil former, said means including a wire-guide rod supporting saidwire-guide, a driving rod, means for moving said driving rod, meansincluding at least one spring coupling said driving rod and saidwire-guide rod, a clamping device for locking the wire-guide rod againstmovement, said clamping device comprising a circular cylinder, acircular resilient sleeve surrounding said cylinder and engaging thecylinder on one side thereof, said cylinder having a recess into which aportion of said wireguide rod fits and is clamped between the sleeve andthe cylinder, and means for deforming the sleeve for a period duringeach turn whereby the wire-guide rod is free to slide between the sleeveand the cylinder and move under the action of the spring a distanceproportional to movement of the driving rod.

7. Apparatus for winding orthocyclically wound coils on a polygonal coilformer comprising means for rotating said coil former, a wire-guidemeans for supplying wire to said coil former, and means periodicallyreciprocally moving said wire-guide in a step-wise movement relative tosaid coil former, said means including a wire-guide rod supporting saidwire guide, a driving rod, means for moving said driving rod, meansincluding spring means coupling said driving rod and said wire-guiderod, a clamping device for locking the wire-guide rod against movement,said clamping device compriisng a circular cylinder, a circularresilient sleeve surrounding said cylinder and engaging the cylinder onone side thereof, said cylinder having a recess into which a portion ofsaid wire-guide rod fits and is clamped between the sleeve and thecylinder, and means for deforming the sleeve for a period during eachturn whereby the wire-guide rod can slide between the sleeve and thecylinder and moves under the action of the spring means a distanceproportional to movement of the driving rod, and means coupled with saidclamping device for imparting a transient displacement to said Wireguiderod whereby said wire-guide is moved to prevent axial pressure betweenturns of wire in said coil.

8. Apparatus for winding orthocyclically wound coils on a polygonal coilformer comprising means for rotating said coil former, a wire-guidemeans for supplying Wire to said coil former, and means periodicallyreciprocally moving said Wire-guide in a step-Wise movement relative tosaid coil former, said means including a wire-guide rod supporting saidwire-guide, a driving rod, means for moving said driving rod, a biasedspring means coupling said driving rod and said wire-guide rod, aclamping device for locking the Wire-guide rod against movement, saidclamping device comprising a circular cylinder, a circular resilientsleeve surrounding said cylinder and engaging the cylinder on one sidethereof, said cylinder having a recess into which a portion of saidwire-guide rod fits and is held against movement between the sleeve andthe cylinder, means for deforming the sleeve for a period during eachturn whereby the Wire guide rod is free to slide between the sleeve andthe cylinder and moves under the action of the spring means proportionalto movement of the driving rod, said means for deforming said sleeveincluding a fixed pin member engaging one side of said sleeve, amoveable pin member engaging the opposite side of said sleeve, a leverrotatable about a shaft, said lever being connected at one end to saidmoveable pin member, a cam engaging the other end of said lever forperiodically rotating said lever and means for imparting a transientmovement to said Wire-guide comprising an eccentrically rotatable leverhaving one end engaging said clamping device and a cam engaging theother end of said lever, a ratchet means engaging said eccentric leverfor engaging and disengaging said eccentric lever and said clampingdevice whereby axial pressure on the starting turns of the wire of saidcoil is prevented.

9. Apparatus for winding orthocyclically wound coils as claimed in claim8, in which an adjustable abutment is provided which is connected withthe driving rod for disengaging said ratchet means.

10. Apparatus for winding orthocyclically wound coils as claimed inclaim 1 in which the means for imparting continuous movement to thedriving rod includes a doubletilting nut co-acting alternately with twothreaded shafts rotating in opposite directions, and meansinterconnecting said nut and said driving rod.

11. Apparatus according to claim 10 wherein said means interconnectingsaid nut and said driving rod including a lever having a displaceablepivot.

References Cited by the Examiner UNITED STATES PATENTS 1,504,005 8/ 1924Vienneau 242-9 1,588,995 6/1926- Ruf.

1,865,236 6/ 1932 Daniels 242-9 2,016,865 10/1935 Lerch 242-7 2,421,2695/1947 Joyce 242-1584 2,973,965 3/ 1961 Whitney 242-1584 MERVIN STEIN,Primary Examiner.

RUSSELL C. MADER, Examiner.

1. APPARATUS FOR WINDING ORTHOCYCLICALLY WOUND COILS ON A COIL FORMER,COMPRISING MEANS FOR ROTATING SAID COIL FORMER, A WIRE-GUIDE MEANS FORDIRECTING WIRE ON TO SAID COIL FORMER, A DRIVING ROD, DRIVE MEANS FORIMPARTING CONTINUOUS MOVEMENT TO SAID DRIVING ROD, MEANS CONNECTING SAIDDRIVING ROD AND WIRE-GUIDE, SAID LAST-NAMED MEANS BEING MOVED BY SAIDDRIVING ROD, AND MEANS OPERATIVELY